Covariance and contravariance
- Covariance and contravariance
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Covariance and contravariance may refer to:
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- Disambiguation pages
- Mathematical disambiguation
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Covariance and contravariance (computer science) — Within the type system of a programming language, covariance and contravariance refers to the ordering of types from narrower to wider and their interchangeability or equivalence in certain situations (such as parameters, generics, and return… … Wikipedia
Covariance and contravariance of vectors — For other uses of covariant or contravariant , see covariance and contravariance. In multilinear algebra and tensor analysis, covariance and contravariance describe how the quantitative description of certain geometric or physical entities… … Wikipedia
Covariance (disambiguation) — Covariance may refer to: Covariance, a measure of how much two variables change together Covariance matrix, a matrix of covariances between a number of variables Cross covariance, the covariance between two vectors of variables Autocovariance,… … Wikipedia
Comparison of C Sharp and Java — The correct title of this article is Comparison of C# and Java. The substitution or omission of the # sign is because of technical restrictions. Programming language comparisons General comparison Basic syntax Basic instructions … Wikipedia
General covariance — In theoretical physics, general covariance (also known as diffeomorphism covariance or general invariance) is the invariance of the form of physical laws under arbitrary differentiable coordinate transformations. The essential idea is that… … Wikipedia
Comparison of Java and C Sharp — This is a comparison of the C# programming language with the Java programming language. As the two are both garbage collected runtime compiled languages with syntax derived from C and C++, there are many similarities between Java and C#. However … Wikipedia
Active and passive transformation — In the physical sciences, an active transformation is one which actually changes the physical state of a system, and makes sense even in the absence of a coordinate system whereas a passive transformation is merely a change in the coordinate… … Wikipedia
C Sharp syntax — The correct title of this article is C# syntax. The substitution or omission of the # sign is because of technical restrictions. Main article: C Sharp (programming language) This article describes the syntax of the C# programming language. The… … Wikipedia
List of mathematics articles (C) — NOTOC C C closed subgroup C minimal theory C normal subgroup C number C semiring C space C symmetry C* algebra C0 semigroup CA group Cabal (set theory) Cabibbo Kobayashi Maskawa matrix Cabinet projection Cable knot Cabri Geometry Cabtaxi number… … Wikipedia
Euclidean vector — This article is about the vectors mainly used in physics and engineering to represent directed quantities. For mathematical vectors in general, see Vector (mathematics and physics). For other uses, see vector. Illustration of a vector … Wikipedia
